from __future__ import print_function

from binascii import hexlify
from copy import deepcopy

from .Constants import *
from .Styles import *

if PY2:
    NumberTypes = (int, float, long)
    StringType = basestring
else:
    NumberTypes = (int, float)
    StringType = str


class UnhandledParamError(Exception):
    def __init__(self, param):
        Exception.__init__(self, "Don't know what to do with param %s" % param)


#                                               red green blue
StandardColours = Colours()
StandardColours.append(Colour("Black", 0, 0, 0))
StandardColours.append(Colour("Blue", 0, 0, 255))
StandardColours.append(Colour("Turquoise", 0, 255, 255))
StandardColours.append(Colour("Green", 0, 255, 0))
StandardColours.append(Colour("Pink", 255, 0, 255))
StandardColours.append(Colour("Red", 255, 0, 0))
StandardColours.append(Colour("Yellow", 255, 255, 0))
StandardColours.append(Colour("White", 255, 255, 255))
StandardColours.append(Colour("Blue Dark", 0, 0, 128))
StandardColours.append(Colour("Teal", 0, 128, 128))
StandardColours.append(Colour("Green Dark", 0, 128, 0))
StandardColours.append(Colour("Violet", 128, 0, 128))
StandardColours.append(Colour("Red Dark", 128, 0, 0))
StandardColours.append(Colour("Yellow Dark", 128, 128, 0))
StandardColours.append(Colour("Grey Dark", 128, 128, 128))
StandardColours.append(Colour("Grey", 192, 192, 192))

StandardFonts = Fonts()
StandardFonts.append(Font("Arial", "swiss", 0, 2, "020b0604020202020204"))
StandardFonts.append(Font("Arial Black", "swiss", 0, 2, "020b0a04020102020204"))
StandardFonts.append(Font("Arial Narrow", "swiss", 0, 2, "020b0506020202030204"))
StandardFonts.append(
    Font("Bitstream Vera Sans Mono", "modern", 0, 1, "020b0609030804020204")
)
StandardFonts.append(Font("Bitstream Vera Sans", "swiss", 0, 2, "020b0603030804020204"))
StandardFonts.append(
    Font("Bitstream Vera Serif", "roman", 0, 2, "02060603050605020204")
)
StandardFonts.append(Font("Book Antiqua", "roman", 0, 2, "02040602050305030304"))
StandardFonts.append(Font("Bookman Old Style", "roman", 0, 2, "02050604050505020204"))
StandardFonts.append(Font("Castellar", "roman", 0, 2, "020a0402060406010301"))
StandardFonts.append(Font("Century Gothic", "swiss", 0, 2, "020b0502020202020204"))
StandardFonts.append(Font("Comic Sans MS", "script", 0, 2, "030f0702030302020204"))
StandardFonts.append(Font("Courier New", "modern", 0, 1, "02070309020205020404"))
StandardFonts.append(
    Font("Franklin Gothic Medium", "swiss", 0, 2, "020b0603020102020204")
)
StandardFonts.append(Font("Garamond", "roman", 0, 2, "02020404030301010803"))
StandardFonts.append(Font("Georgia", "roman", 0, 2, "02040502050405020303"))
StandardFonts.append(Font("Haettenschweiler", "swiss", 0, 2, "020b0706040902060204"))
StandardFonts.append(Font("Impact", "swiss", 0, 2, "020b0806030902050204"))
StandardFonts.append(Font("Lucida Console", "modern", 0, 1, "020b0609040504020204"))
StandardFonts.append(Font("Lucida Sans Unicode", "swiss", 0, 2, "020b0602030504020204"))
StandardFonts.append(
    Font("Microsoft Sans Serif", "swiss", 0, 2, "020b0604020202020204")
)
StandardFonts.append(Font("Monotype Corsiva", "script", 0, 2, "03010101010201010101"))
StandardFonts.append(Font("Palatino Linotype", "roman", 0, 2, "02040502050505030304"))
StandardFonts.append(Font("Papyrus", "script", 0, 2, "03070502060502030205"))
StandardFonts.append(Font("Sylfaen", "roman", 0, 2, "010a0502050306030303"))
StandardFonts.append(Font("Symbol", "roman", 2, 2, "05050102010706020507"))
StandardFonts.append(Font("Tahoma", "swiss", 0, 2, "020b0604030504040204"))
StandardFonts.append(Font("Times New Roman", "roman", 0, 2, "02020603050405020304"))
StandardFonts.append(Font("Trebuchet MS", "swiss", 0, 2, "020b0603020202020204"))
StandardFonts.append(Font("Verdana", "swiss", 0, 2, "020b0604030504040204"))

StandardFonts.Castellar.SetAlternate(StandardFonts.Georgia)

"""
Found the following definition at http://www.pbdr.com/vbtips/gen/convtwip.htm

Twips are screen-independent units used to ensure that the placement and
proportion of screen elements in your screen application are the same on all
display systems. A twip is a unit of screen measurement equal to 1/20 of a
printer's point. The conversion between twips and
inches/centimeters/millimeters is as follows:

There are approximately 1440 twips to a inch (the length of a screen item
measuring one inch when printed).

As there are 2.54 centimeters to 1 inch, then there are approximately 567
twips to a centimeter (the length of a screen item measuring one centimeter
when printed).

Or in millimeters, as there are 25.4 millimeters to 1 inch, therefore there
are approximately 56.7 twips to a millimeter (the length of a screen item
measuring one millimeter when printed)."""

# Width default is 12240, Height default is 15840
StandardPaper = Papers()
StandardPaper.append(Paper("LETTER", 1, "Letter 8 1/2 x 11 in", 12240, 15840))
StandardPaper.append(
    Paper("LETTERSMALL", 2, "Letter Small 8 1/2 x 11 in", 12240, 15840)
)
StandardPaper.append(Paper("TABLOID", 3, "Tabloid 11 x 17 in", 15840, 24480))
StandardPaper.append(Paper("LEDGER", 4, "Ledger 17 x 11 in", 24480, 15840))
StandardPaper.append(Paper("LEGAL", 5, "Legal 8 1/2 x 14 in", 12240, 20160))
StandardPaper.append(Paper("STATEMENT", 6, "Statement 5 1/2 x 8 1/2 in", 7920, 12240))
StandardPaper.append(Paper("EXECUTIVE", 7, "Executive 7 1/4 x 10 1/2 in", 10440, 15120))
StandardPaper.append(Paper("A3", 8, "A3 297 x 420 mm", 16838, 23811))
StandardPaper.append(Paper("A4", 9, "A4 210 x 297 mm", 11907, 16838))
StandardPaper.append(Paper("A4SMALL", 10, "A4 Small 210 x 297 mm", 11907, 16838))
StandardPaper.append(Paper("A5", 11, "A5 148 x 210 mm", 8391, 11907))
StandardPaper.append(Paper("B4", 12, "B4 (JIS) 250 x 354", 14175, 20072))
StandardPaper.append(Paper("B5", 13, "B5 (JIS) 182 x 257 mm", 10319, 14572))
StandardPaper.append(Paper("FOLIO", 14, "Folio 8 1/2 x 13 in", 12240, 18720))
StandardPaper.append(Paper("QUARTO", 15, "Quarto 215 x 275 mm", 12191, 15593))
StandardPaper.append(Paper("10X14", 16, "10x14 in", 14400, 20160))
StandardPaper.append(Paper("11X17", 17, "11x17 in", 15840, 24480))
StandardPaper.append(Paper("NOTE", 18, "Note 8 1/2 x 11 in", 12240, 15840))
StandardPaper.append(Paper("ENV_9", 19, "Envelope #9 3 7/8 x 8 7/8", 5580, 12780))
StandardPaper.append(Paper("ENV_10", 20, "Envelope #10 4 1/8 x 9 1/2", 5940, 13680))
StandardPaper.append(Paper("ENV_11", 21, "Envelope #11 4 1/2 x 10 3/8", 6480, 14940))
StandardPaper.append(Paper("ENV_12", 22, "Envelope #12 4 3/4 x 11", 6840, 15840))
StandardPaper.append(Paper("ENV_14", 23, "Envelope #14 5 x 11 1/2", 7200, 16560))
StandardPaper.append(Paper("CSHEET", 24, "C size sheet 18 x 24 in", 29520, 34560))
StandardPaper.append(Paper("DSHEET", 25, "D size sheet 22 x 34 in", 31680, 48960))
StandardPaper.append(Paper("ESHEET", 26, "E size sheet 34 x 44 in", 48960, 63360))
StandardPaper.append(Paper("ENV_DL", 27, "Envelope DL 110 x 220mm", 6237, 12474))
StandardPaper.append(Paper("ENV_C5", 28, "Envelope C5 162 x 229 mm", 9185, 12984))
StandardPaper.append(Paper("ENV_C3", 29, "Envelope C3  324 x 458 mm", 18371, 25969))
StandardPaper.append(Paper("ENV_C4", 30, "Envelope C4  229 x 324 mm", 12984, 18371))
StandardPaper.append(Paper("ENV_C6", 31, "Envelope C6  114 x 162 mm", 6464, 9185))
StandardPaper.append(Paper("ENV_C65", 32, "Envelope C65 114 x 229 mm", 6464, 12984))
StandardPaper.append(Paper("ENV_B4", 33, "Envelope B4  250 x 353 mm", 14175, 20015))
StandardPaper.append(Paper("ENV_B5", 34, "Envelope B5  176 x 250 mm", 9979, 14175))
StandardPaper.append(Paper("ENV_B6", 35, "Envelope B6  176 x 125 mm", 9979, 7088))
StandardPaper.append(Paper("ENV_ITALY", 36, "Envelope 110 x 230 mm", 6237, 13041))
StandardPaper.append(
    Paper("ENV_MONARCH", 37, "Envelope Monarch 3.875 x 7.5 in", 5580, 10800)
)
StandardPaper.append(
    Paper("ENV_PERSONAL", 38, "6 3/4 Envelope 3 5/8 x 6 1/2 in", 5220, 9360)
)
StandardPaper.append(
    Paper("FANFOLD_US", 39, "US Std Fanfold 14 7/8 x 11 in", 21420, 15840)
)
StandardPaper.append(
    Paper("FANFOLD_STD_GERMAN", 40, "German Std Fanfold 8 1/2 x 12 in", 12240, 17280)
)
StandardPaper.append(
    Paper("FANFOLD_LGL_GERMAN", 41, "German Legal Fanfold 8 1/2 x 13 in", 12240, 18720)
)


#
#   Finally a StyleSheet in which all of this stuff is put together
#
class StyleSheet:
    def __init__(self, colours=None, fonts=None):
        self.Colours = colours or deepcopy(StandardColours)
        self.Fonts = fonts or deepcopy(StandardFonts)

        self.TextStyles = AttributedList()
        self.ParagraphStyles = AttributedList()


class Section(list):
    NONE = 1
    COLUMN = 2
    PAGE = 3
    EVEN = 4
    ODD = 5
    BREAK_TYPES = [NONE, COLUMN, PAGE, EVEN, ODD]

    def __init__(
        self,
        paper=None,
        margins=None,
        break_type=None,
        headery=None,
        footery=None,
        landscape=None,
        first_page_number=None,
    ):
        super(Section, self).__init__()

        self.Paper = paper or StandardPaper.A4
        self.SetMargins(margins)

        self.Header = []
        self.Footer = []
        self.FirstHeader = []
        self.FirstFooter = []

        self.SetBreakType(break_type or self.NONE)
        self.SetHeaderY(headery)
        self.SetFooterY(footery)
        self.SetLandscape(landscape)
        self.SetFirstPageNumber(first_page_number)

    def TwipsToRightMargin(self):
        return self.Paper.Width - (self.Margins.Left + self.Margins.Right)

    def SetMargins(self, value):
        self.Margins = value or MarginsPropertySet(
            top=1000, left=1200, bottom=1000, right=1200
        )
        self.Width = self.Paper.Width - (self.Margins.Left + self.Margins.Right)

    def SetBreakType(self, value):
        assert value in self.BREAK_TYPES
        self.BreakType = value
        return self

    def SetHeaderY(self, value):
        self.HeaderY = value
        return self

    def SetFooterY(self, value):
        self.FooterY = value
        return self

    def SetLandscape(self, value):
        self.Landscape = False
        if value:
            self.Landscape = True
        return self

    def SetFirstPageNumber(self, value):
        self.FirstPageNumber = value
        return self


def MakeDefaultStyleSheet():
    result = StyleSheet()

    NormalText = TextStyle(TextPropertySet(result.Fonts.Arial, 22))

    ps = ParagraphStyle(
        "Normal",
        NormalText.Copy(),
        ParagraphPropertySet(space_before=60, space_after=60),
    )
    result.ParagraphStyles.append(ps)

    ps = ParagraphStyle("Normal Short", NormalText.Copy())
    result.ParagraphStyles.append(ps)

    NormalText.TextPropertySet.SetSize(32)
    ps = ParagraphStyle(
        "Heading 1",
        NormalText.Copy(),
        ParagraphPropertySet(space_before=240, space_after=60),
    )
    result.ParagraphStyles.append(ps)

    NormalText.TextPropertySet.SetSize(24).SetBold(True)
    ps = ParagraphStyle(
        "Heading 2",
        NormalText.Copy(),
        ParagraphPropertySet(space_before=240, space_after=60),
    )
    result.ParagraphStyles.append(ps)

    #   Add some more in that are based on the normal template but that
    #   have some indenting set that makes them suitable for doing numbered
    normal_numbered = result.ParagraphStyles.Normal.Copy()
    normal_numbered.SetName("Normal Numbered")
    normal_numbered.ParagraphPropertySet.SetFirstLineIndent(
        TabPropertySet.DEFAULT_WIDTH * -1
    )
    normal_numbered.ParagraphPropertySet.SetLeftIndent(TabPropertySet.DEFAULT_WIDTH)

    result.ParagraphStyles.append(normal_numbered)

    normal_numbered2 = result.ParagraphStyles.Normal.Copy()
    normal_numbered2.SetName("Normal Numbered 2")
    normal_numbered2.ParagraphPropertySet.SetFirstLineIndent(
        TabPropertySet.DEFAULT_WIDTH * -1
    )
    normal_numbered2.ParagraphPropertySet.SetLeftIndent(
        TabPropertySet.DEFAULT_WIDTH * 2
    )

    result.ParagraphStyles.append(normal_numbered2)

    ## LIST STYLES
    for idx, indent in [
        (1, TabPS.DEFAULT_WIDTH),
        (2, TabPS.DEFAULT_WIDTH * 2),
        (3, TabPS.DEFAULT_WIDTH * 3),
    ]:
        indent = TabPropertySet.DEFAULT_WIDTH
        ps = ParagraphStyle(
            "List %s" % idx,
            TextStyle(TextPropertySet(result.Fonts.Arial, 22)),
            ParagraphPropertySet(
                space_before=60,
                space_after=60,
                first_line_indent=-indent,
                left_indent=indent,
            ),
        )
        result.ParagraphStyles.append(ps)

    return result


class TAB:
    pass


class LINE:
    pass


class RawCode:
    def __init__(self, data):
        self.Data = data


PAGE_NUMBER = RawCode(r"{\field{\fldinst page}}")
TOTAL_PAGES = RawCode(r"{\field{\fldinst numpages}}")
SECTION_PAGES = RawCode(r"{\field{\fldinst sectionpages}}")
ARIAL_BULLET = RawCode(r"{\f2\'95}")


def _get_jpg_dimensions(fin):
    """
    converted from: http://dev.w3.org/cvsweb/Amaya/libjpeg/rdjpgcom.c?rev=1.2
    """

    M_SOF0 = chr(0xC0)  #   /* Start Of Frame N */
    M_SOF1 = chr(0xC1)  #   /* N indicates which compression process */
    M_SOF2 = chr(0xC2)  #   /* Only SOF0-SOF2 are now in common use */
    M_SOF3 = chr(0xC3)  #
    M_SOF5 = chr(0xC5)  #   /* NB: codes C4 and CC are NOT SOF markers */
    M_SOF6 = chr(0xC6)  #
    M_SOF7 = chr(0xC7)  #
    M_SOF9 = chr(0xC9)  #
    M_SOF10 = chr(0xCA)  #
    M_SOF11 = chr(0xCB)  #
    M_SOF13 = chr(0xCD)  #
    M_SOF14 = chr(0xCE)  #
    M_SOF15 = chr(0xCF)  #
    M_SOI = chr(0xD8)  #   /* Start Of Image (beginning of datastream) */
    M_EOI = chr(0xD9)  #   /* End Of Image (end of datastream) */

    M_FF = chr(0xFF)

    MARKERS = [
        M_SOF0,
        M_SOF1,
        M_SOF2,
        M_SOF3,
        M_SOF5,
        M_SOF6,
        M_SOF7,
        M_SOF9,
        M_SOF10,
        M_SOF11,
        M_SOF13,
        M_SOF14,
        M_SOF15,
    ]

    def get_length():
        b1 = fin.read(1)
        b2 = fin.read(1)
        return (ord(b1) << 8) + ord(b2)

    def next_marker():
        #  markers come straight after an 0xFF so skip everything
        #  up to the first 0xFF that we find
        while fin.read(1) != M_FF:
            pass

        #  there can be more than one 0xFF as they can be used
        #  for padding so we are now looking for the first byte
        #  that isn't an 0xFF, this will be the marker
        while True:
            result = fin.read(1)
            if result != M_FF:
                return result

        raise Exception("Invalid JPEG")

    #  BODY OF THE FUNCTION
    if not ((fin.read(1) == M_FF) and (fin.read(1) == M_SOI)):
        raise Exception("Invalid Jpeg")

    while True:
        marker = next_marker()

        #  the marker is always followed by two bytes representing the length of the data field
        length = get_length()
        if length < 2:
            raise Exception("Erroneous JPEG marker length")

        #  if it is a compression process marker then it will contain the dimension of the image
        if marker in MARKERS:
            #  the next byte is the data precision, just skip it
            fin.read(1)

            #  bingo
            image_height = get_length()
            image_width = get_length()
            return image_width, image_height

        #  just skip whatever data it contains
        fin.read(length - 2)

    raise Exception("Invalid JPEG, end of stream reached")


_PNG_HEADER = "\x89\x50\x4e"


def _get_png_dimensions(data):
    if data[0:3] != _PNG_HEADER:
        raise Exception("Invalid PNG image")

    width = (ord(data[18]) * 256) + (ord(data[19]))
    height = (ord(data[22]) * 256) + (ord(data[23]))
    return width, height


def _get_emf_dimensions(fin):
    import struct

    def get_DWORD():
        return struct.unpack("<L", fin.read(4))[0]

    def get_LONG():
        return struct.unpack("<l", fin.read(4))[0]

    def get_WORD():
        return struct.unpack("<H", fin.read(2))[0]

    class Empty:
        pass

    header = Empty()
    header.RecordType = get_DWORD()  # Record type
    header.RecordSize = get_DWORD()  # Size of the record in bytes
    header.BoundsLeft = get_LONG()  # Left inclusive bounds
    header.BoundsTop = get_LONG()  # Top inclusive bounds
    header.BoundsRight = get_LONG()  # Right inclusive bounds
    header.BoundsBottom = get_LONG()  # Bottom inclusive bounds
    header.FrameLeft = get_LONG()  # Left side of inclusive picture frame
    header.FrameTop = get_LONG()  # Top side of inclusive picture frame
    header.FrameRight = get_LONG()  # Right side of inclusive picture frame
    header.FrameBottom = get_LONG()  # Bottom side of inclusive picture frame
    header.Signature = get_DWORD()  # Signature ID (always 0x464D4520)
    header.Version = get_DWORD()  # Version of the metafile
    header.Size = get_DWORD()  # Size of the metafile in bytes
    header.NumOfRecords = get_DWORD()  # Number of records in the metafile
    header.NumOfHandles = get_WORD()  # Number of handles in the handle table
    header.Reserved = get_WORD()  # Not used (always 0)
    header.SizeOfDescrip = get_DWORD()  # Size of description string in WORDs
    header.OffsOfDescrip = get_DWORD()  # Offset of description string in metafile
    header.NumPalEntries = get_DWORD()  # Number of color palette entries
    header.WidthDevPixels = get_LONG()  # Width of reference device in pixels
    header.HeightDevPixels = get_LONG()  # Height of reference device in pixels
    header.WidthDevMM = get_LONG()  # Width of reference device in millimeters
    header.HeightDevMM = get_LONG()  # Height of reference device in millimeters

    if 0:
        klist = sorted(header.__dict__.keys())
        for k in klist:
            print("%20s:%s" % (k, header.__dict__[k]))

    dw = header.FrameRight - header.FrameLeft
    dh = header.FrameBottom - header.FrameTop

    # convert from 0.01mm units to 1/72in units
    return int(dw * 72.0 / 2540.0), int(dh * 72.0 / 2540.0)


class Image(RawCode):
    #  Need to add in the width and height in twips as it crashes
    #  word xp with these values.  Still working out the most
    #  efficient way of getting these values.
    # \picscalex100\picscaley100\piccropl0\piccropr0\piccropt0\piccropb0
    # picwgoal900\pichgoal281

    PNG_LIB = "pngblip"
    JPG_LIB = "jpegblip"
    EMF_LIB = "emfblip"
    PICT_TYPES = {"png": PNG_LIB, "jpg": JPG_LIB, "emf": EMF_LIB}

    def __init__(self, infile, **kwargs):
        if hasattr(infile, "read"):
            fin = infile
            if "datatype" not in kwargs.keys():
                msg = (
                    "If passing in a file object, you must also specify type='xxx' where xxx is one of %s"
                    % self.PICT_TYPES.keys()
                )
                raise ValueError(msg)
            file_name = kwargs.pop("datatype")
        else:
            fin = file(infile, "rb")
            file_name = infile

        pict_type = self.PICT_TYPES[file_name[-3:].lower()]
        if pict_type == self.PNG_LIB:
            width, height = _get_png_dimensions(fin.read(100))
        elif pict_type == self.JPG_LIB:
            width, height = _get_jpg_dimensions(fin)
        elif pict_type == self.EMF_LIB:
            width, height = _get_emf_dimensions(fin)

        # if user specified height or width but not both, then
        # scale unspecified dimension to maintain aspect ratio

        if ("width" in kwargs) and ("height" not in kwargs):
            height = int(height * float(kwargs["width"]) / width)
        elif ("height" in kwargs) and ("width" not in kwargs):
            width = int(width * float(kwargs["height"]) / height)

        width = kwargs.pop("width", width)
        height = kwargs.pop("height", height)

        codes = [pict_type, "picwgoal%s" % (width * 20), "pichgoal%s" % (height * 20)]
        # let user specify global scaling
        scale = kwargs.pop("scale", 100)

        for kwarg, code, default in [
            ("scale_x", "scalex", scale),
            ("scale_y", "scaley", scale),
            ("crop_left", "cropl", "0"),
            ("crop_right", "cropr", "0"),
            ("crop_top", "cropt", "0"),
            ("crop_bottom", "cropb", "0"),
        ]:
            codes.append("pic%s%s" % (code, kwargs.pop(kwarg, default)))

        #  reset back to the start of the file to get all of it and now
        #  turn it into hex.
        fin.seek(0, 0)
        image = hexlify(fin.read())
        fin.close()
        data = []
        for i in range(0, len(image), 128):
            data.append(image[i : i + 128])

        data = r"{\pict{\%s}%s}" % ("\\".join(codes), "\n".join(data))
        RawCode.__init__(self, data)

    def ToRawCode(self, var_name):
        return '%s = RawCode( """%s""" )' % (var_name, self.Data)


class Text:
    def __init__(self, *params):
        self.Data = None
        self.Style = None
        self.Properties = None
        self.Shading = None

        for param in params:
            if isinstance(param, TextStyle):
                self.Style = param
            elif isinstance(param, TextPS):
                self.Properties = param
            elif isinstance(param, ShadingPS):
                self.Shading = param
            else:
                #   otherwise let the rendering custom handler sort it out itself
                self.Data = param

    def SetData(self, value):
        self.Data = value


class Inline(list):
    def __init__(self, *params):
        super(Inline, self).__init__()

        self.Style = None
        self.Properties = None
        self.Shading = None

        self._append = super(Inline, self).append

        for param in params:
            if isinstance(param, TextStyle):
                self.Style = param
            elif isinstance(param, TextPS):
                self.Properties = param
            elif isinstance(param, ShadingPS):
                self.Shading = param
            else:
                #   otherwise we add to it to our list of elements and let
                #   the rendering custom handler sort it out itself.
                self.append(param)

    def append(self, *params):
        #   filter out any that are explicitly None
        [self._append(param) for param in params if param is not None]


class Paragraph(list):
    def __init__(self, *params):
        super(Paragraph, self).__init__()

        self.Style = None
        self.Properties = None
        self.Frame = None
        self.Shading = None

        self._append = super(Paragraph, self).append

        for param in params:
            if isinstance(param, ParagraphStyle):
                self.Style = param
            elif isinstance(param, ParagraphPS):
                self.Properties = param
            elif isinstance(param, FramePS):
                self.Frame = param
            elif isinstance(param, ShadingPS):
                self.Shading = param
            else:
                #   otherwise we add to it to our list of elements and let
                #   the rendering custom handler sort it out itself.
                self.append(param)

    def append(self, *params):
        #   filter out any that are explicitly None
        [self._append(param) for param in params if param is not None]

    def insert(self, index, value):
        if value is not None:
            super(Paragraph, self).insert(index, value)


class Table:
    LEFT = 1
    RIGHT = 2
    CENTER = 3
    ALIGNMENT = [LEFT, RIGHT, CENTER]

    NO_WRAPPING = 1
    WRAP_AROUND = 2
    WRAPPING = [NO_WRAPPING, WRAP_AROUND]

    #   trrh height of row, 0 means automatically adjust, use negative for an absolute
    #   trgaph is half of the space between a table cell in width, reduce this one
    #   to get a really tiny column

    def __init__(self, *column_widths, **kwargs):
        self.Rows = []

        self.SetAlignment(kwargs.pop("alignment", self.LEFT))
        self.SetLeftOffset(kwargs.pop("left_offset", None))
        self.SetGapBetweenCells(kwargs.pop("gap_between_cells", None))
        self.SetColumnWidths(*column_widths)

        assert not kwargs, "invalid keyword args %s" % kwargs

    def SetAlignment(self, value):
        assert value is None or value in self.ALIGNMENT
        self.Alignment = value or self.LEFT
        return self

    def SetLeftOffset(self, value):
        self.LeftOffset = value
        return self

    def SetGapBetweenCells(self, value):
        self.GapBetweenCells = value
        return self

    def SetColumnWidths(self, *column_widths):
        self.ColumnWidths = column_widths
        self.ColumnCount = len(column_widths)
        return self

    def AddRow(self, *cells):
        height = None
        if isinstance(cells[0], NumberTypes):
            height = int(cells[0])
            cells = cells[1:]

        #  make sure all of the spans add up to the number of columns
        #  otherwise the table will get corrupted
        if self.ColumnCount != sum([cell.Span for cell in cells]):
            raise Exception("ColumnCount != the total of this row's cell.Spans.")

        self.Rows.append((height, cells))

    append = AddRow


class Cell(list):
    """
    \clvertalt  Text is top-aligned in cell (the default).
    \clvertalc  Text is centered vertically in cell.
    \clvertalb  Text is bottom-aligned in cell.
    \cltxlrtb   Vertical text aligned left (direction bottom up).
    \cltxtbrl   Vertical text aligned right (direction top down).
    """

    ALIGN_TOP = 1
    ALIGN_CENTER = 2
    ALIGN_BOTTOM = 3

    FLOW_LR_TB = 1
    FLOW_RL_TB = 2
    FLOW_LR_BT = 3
    FLOW_VERTICAL_LR_TB = 4
    FLOW_VERTICAL_TB_RL = 5

    def __init__(self, *params, **kwargs):
        super(Cell, self).__init__()

        self.SetFrame(None)
        self.SetMargins(None)

        self.SetAlignment(kwargs.get("alignment", self.ALIGN_TOP))
        self.SetFlow(kwargs.get("flow", self.FLOW_LR_TB))
        self.SetSpan(kwargs.get("span", 1))

        self.SetStartVerticalMerge(kwargs.get("start_vertical_merge", False))
        self.SetVerticalMerge(kwargs.get("vertical_merge", False))

        self._append = super(Cell, self).append

        for param in params:
            if isinstance(param, StringType):
                self.append(param)
            elif isinstance(param, Paragraph):
                self.append(param)
            elif isinstance(param, FramePS):
                self.SetFrame(param)
            elif isinstance(param, MarginsPS):
                self.SetMargins(param)

    def SetFrame(self, value):
        self.Frame = value
        return self

    def SetMargins(self, value):
        self.Margins = value
        return self

    def SetAlignment(self, value):
        assert value in [
            self.ALIGN_TOP,
            self.ALIGN_CENTER,
            self.ALIGN_BOTTOM,
        ]  # , self.ALIGN_TEXT_TOP_DOWN, self.ALIGN_TEXT_BOTTOM_UP ]
        self.Alignment = value

    def SetFlow(self, value):
        assert value in [
            self.FLOW_LR_TB,
            self.FLOW_RL_TB,
            self.FLOW_LR_BT,
            self.FLOW_VERTICAL_LR_TB,
            self.FLOW_VERTICAL_TB_RL,
        ]
        self.Flow = value

    def SetSpan(self, value):
        #  must be a positive integer
        self.Span = int(max(value, 1))
        return self

    def SetStartVerticalMerge(self, value):
        self.StartVerticalMerge = False
        if value:
            self.StartVerticalMerge = True
        return self

    def SetVerticalMerge(self, value):
        self.VerticalMerge = False
        if value:
            self.VerticalMerge = True
        return self

    def append(self, *params):
        [self._append(param) for param in params]


class Document:
    def __init__(
        self,
        style_sheet=None,
        default_language=None,
        view_kind=None,
        view_zoom_kind=None,
        view_scale=None,
    ):
        self.StyleSheet = style_sheet or MakeDefaultStyleSheet()
        self.Sections = AttributedList(Section)

        self.SetTitle(None)

        self.DefaultLanguage = default_language or Languages.DEFAULT
        self.ViewKind = view_kind or ViewKind.DEFAULT
        self.ViewZoomKind = view_zoom_kind
        self.ViewScale = view_scale

    def NewSection(self, *params, **kwargs):
        result = Section(*params, **kwargs)
        self.Sections.append(result)
        return result

    def SetTitle(self, value):
        self.Title = value
        return self

    def Copy(self):
        result = Document(
            style_sheet=self.StyleSheet.Copy(),
            default_language=self.DefaultLanguage,
            view_kind=self.ViewKind,
            view_zoom_kind=self.ViewZoomKind,
            view_scale=self.ViewScale,
        )
        result.SetTitle(self.Title)
        result.Sections = self.Sections.Copy()

        return result


def TEXT(*params, **kwargs):
    text_props = TextPropertySet()
    text_props.SetFont(kwargs.get("font", None))
    text_props.SetSize(kwargs.get("size", None))
    text_props.SetBold(kwargs.get("bold", False))
    text_props.SetItalic(kwargs.get("italic", False))
    text_props.SetUnderline(kwargs.get("underline", False))
    text_props.SetColour(kwargs.get("colour", None))

    if len(params) == 1:
        return Text(params[0], text_props)

    result = Inline(text_props)
    result.append(*params)
    return result


def B(*params):
    text_props = TextPropertySet(bold=True)

    if len(params) == 1:
        return Text(params[0], text_props)

    result = Inline(text_props)
    result.append(*params)
    return result


def I(*params):
    text_props = TextPropertySet(italic=True)

    if len(params) == 1:
        return Text(params[0], text_props)

    result = Inline(text_props)
    result.append(*params)
    return result


def U(*params):
    text_props = TextPropertySet(underline=True)

    if len(params) == 1:
        return Text(params[0], text_props)

    result = Inline(text_props)
    result.append(*params)
    return result
